Two-Stage Adjustable Supercharging System for Internal Combustion Engine

Abstract

The invention discloses a two-stage adjustable pressurization system of an internal combustion engine. The two-stage adjustable pressurization system comprises two internal combustion engine air cylinder sets, wherein a high-pressure stage turbine and a low-pressure stage turbine are arranged on each internal combustion engine air cylinder set in the exhaust direction; a low-pressure stage compressor, an intercooler and a high-pressure stage compressor are arranged on each internal combustion engine air cylinder set in the intake direction; the high-pressure stage turbine and the high-pressure stage compressor of each set share a transmission shaft, and the low-pressure stage turbine and the low-pressure stage compressor of each set share a transmission shaft; one side of an intake and exhaust bypass valve is communicated with outlets of the high-pressure stage compressors, and the other side of the intake and exhaust bypass valve is communicated with air inlets of the high-pressure stage turbines. Only one intake and exhaust bypass valve is arranged and communicated with the outlets of the two high-pressure stage compressors and the air inlets of the high-pressure stage turbines, a high-pressure stage turbine bypass valve is further arranged and communicated with the air inlets and air outlets of the high-pressure stage turbines, and therefore only a few bypass valves are needed so that the whole system can be adjusted and adapt to various working conditions.

Description

technical field [0001] The invention relates to a supercharging system of an internal combustion engine, in particular to a two-stage adjustable supercharging system of an internal combustion engine. Background technique [0002] With the implementation of future marine emission regulations and the pursuit of high power density and high efficiency for diesel engines and other internal combustion engines, the two-stage supercharging technology with higher pressure ratio is the development trend of marine diesel engines and other internal combustion engines. However, at present, the vast majority of internal combustion engines such as marine diesel engines are single-stage supercharged. Most of the existing two-stage supercharging technology is to adopt a high-pressure supercharger and a low-pressure supercharger connected in series, such as a kind of internal combustion engine disclosed in Chinese patent (publication number CN 1834421A), which has a motor and a At least two-...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a two-stage adjustable supercharging system for an internal combustion engine that can operate efficiently under all working conditions in order to overcome the defect of low operating efficiency of the prior art internal combustion engine supercharging system under some working conditions

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